Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 4930317 | Apparatus for localized heat and cold therapy A hot/cold therapy device includes a hot/cold pad assembly remotely connected to a control module. The hot/cold pad assembly includes a flexible pad filled with a convection (gel) or conduction (laminated metal, rubber impregnated with metal particles, et... | 06/05/1990 |
| 4922721 | Transporter unit with communication media environmental storage modules A transport apparatus, for hauling data storage media requiring environmental protection to and from a permanent storage site, includes a portable transport module and a transport cart. The transport module includes an insulated housing having guides for ... | 05/08/1990 |
| 4467611 | Thermoelectric power generating device Alternating current is applied to a bi-directional triode thyristor (triac) and a zero voltage switch, the zero voltage switch controls the operation of the triac to selectively heat a heater element, the thermal energy of the heater element drives a firs... | 08/28/1984 |
| 4379232 | Ferroelectric imaging system An improved ferroelectric imaging system comprises a chopper, lens system, ferroelectric detector matrix, switching matrix, temperature controlled heat sink, drive and read out electronics, video processor and display. The chopper interrupts infrared ener... | 04/05/1983 |
| 4360732 | Infrared charge transfer device (CTD) system An infrared charge transfer device (CTD) imaging system is disclosed which includes an optic system for focusing infrared energy emanating from a scene, a detector matrix for receiving the focused infrared energy and converting it to electrical signals re... | 11/23/1982 |
| 4253022 | Infrared detector array assembly with attached optical microphonics filter An infrared detector assembly comprising a substrate of suitable material such as sapphire, an infrared detector array attached to the substrate, a cold shield attached to the detector array, and an optical microphonics filter attached to the cold shield ... | 02/24/1981 |
| 4242706 | Visible light and near infrared imaging device A visible light and near infrared imaging device is disclosed. The imaging device comprises X-Y addressing means, an array of opto-electronic semiconductor elements or cells, a multiplexer, a precharge switch, and an amplifier. The X-Y addressing means se... | 12/30/1980 |
| 4208087 | Optical flexure joint An optical flexure joint comprises first and second gimbal mounted lens doublets. The first doublet has a positive surface and the second a negative surface. Each lens doublet consists of two common glasses having index of refractions between about 1.4 an... | 06/17/1980 |
| 4205227 | Single junction emitter array An apparatus for translating information in one form to electrical signals for driving a single junction emitter light source is disclosed. For example, a device for scanning radiant energy includes a detector array for converting detected invisible elect... | 05/27/1980 |
| 4186342 | Marine radio telephone An improved marine radio telephone is disclosed which has a housing having an angular opening suitable for either above or below eye level installation and a chassis having printed wiring board support members including a tiltable front panel support memb... | 01/29/1980 |
| 4185287 | Mechanically scanned antenna system A mechanically scanned antenna system having a multiport rotary switch for sector scanning is disclosed. The switch includes a stationary subassembly and a rotating subassembly. The stationary subassembly contains the input ports and the rotating subassem... | 01/22/1980 |
| 4178612 | Delta frame circuit A delta frame circuit is disclosed. The delta frame circuit is connected to the video output of, for example, an imaging system for the purpose of producing a moving target indication radar or, for example, a chopped imaging system for the purpose of remo... | 12/11/1979 |
| 4162402 | Ferroelectric imaging system An improved ferroelectric imaging system comprises a chopper, lens system, ferroelectric detector matrix, switching matrix, temperature controlled heat sink, drive and read out electronics, video processor and display. The chopper interrupts infrared ener... | 07/24/1979 |
| 4143269 | Ferroelectric imaging system An improved ferroelectric imaging system comprises a chopper, lens system, ferroelectric detector matrix, anistropic heat sink, switching matrix, temperature controlled heat sink, drive and read out electronics, video processor, and display. The chopper i... | 03/06/1979 |
| 4143378 | Pendulum antenna A pendulum antenna for a microwave landing system is disclosed. The antenna is an elevation scanning antenna of the phased array type. The aperture, phase shifters, drivers and power distribution manifolds form a column-like structure. The column is suspe... | 03/06/1979 |
| 4142207 | Ferroelectric imaging system An improved ferroelectric imaging system comprises a chopper, lens system, ferroelectric detector matrix, switching matrix, drive and readout electronics, video processor and display. The chopper interrupts infrared energy emanating from a scene, and the ... | 02/27/1979 |
| 4134117 | Loran C receiver A Loran C receiver is disclosed which has a scanned type keyboard including data entry, primary function and special function keys. The primary function keys include an automatic key for selecting automatic operation. A microprocessor is controlled by the... | 01/09/1979 |
| 4126882 | Package for multielement electro-optical devices Disclosed is a semiconductor device package for a multielement electro-optical device. The package includes a base structure, a cover and an environmental seal. The cover is secured with screws to the base structure and sealed at this interface to provide... | 11/21/1978 |
| 4120085 | Beam type planar array antenna method of fabrication An improved planar (flat plate) array antenna system and method of fabrication is disclosed. A planar array antenna or array is mounted in a support for stabilization against roll and pitch movements with a rotary joint providing uninterrupted radar opera... | 10/17/1978 |
| 4121248 | Streak reduction system for FLIR display An improved a.c. coupled forward looking infrared (FLIR) system is disclosed. In a.c. coupled FLIR systems utilizing an array of detectors, the video signals produced when scanning "hot targets" are distorted toward the dark end of the display dynamic ran... | 10/17/1978 |
| 4111384 | Scanner system for laser beam rider guidance systems A laser beamrider guidance system having an improved launcher based laser transmitter subsystem for illuminating a laser beam receiver subsystem on-board a moving carrier is disclosed. The improved launcher based laser transmitter subsystem includes a bor... | 09/05/1978 |
| 4111385 | Laser beam rider guidance system A laser beam rider guidance system having a launcher based electro-optical subsystem illuminating a light receiver subsystem on board a moving carrier is disclosed. A launcher based laser beam transmitter assembly transmits a synchronization beam, an x sc... | 09/05/1978 |
| 4112372 | Spread spectrum communication system An improved spread spectrum communication system having a transmitter subsystem and a receiver subsystem is disclosed. The transmitter subsystem comprises a data source of 50 bps rate which is modulo-2 added to a C/A (clear/acquisition) code of 1,023K chi... | 09/05/1978 |
| 4111383 | Laser beam transmitter system for laser beam rider guidance systems A laser beam rider guidance system having an improved launcher based laser transmitter subsystem for illuminating a laser beam receiver subsystem on board a moving carrier is disclosed. The improved launcher based laser transmitter subsystem includes a bo... | 09/05/1978 |
| 4097708 | Solid state microwave oven power source Disclosed is a solid state power source which combines the power of a plurality of negative resistance transistor packages in a circular cavity to form an oscillator producing a resonant source of microwave energy for radar or microwave energy oven applic... | 06/27/1978 |
| 4080532 | Ferroelectric imaging system A ferroelectric imaging system is taught. The system comprises a lens system, detector matrix, drive and readout electronics, controller, video processor and display. The lens system is a lens system for focusing electromagnetic energy from a scene onto a... | 03/21/1978 |
| 4073969 | Method of fabricating a photoconductive detector of increased responsivity A method of fabricating a photoconductive detector of increased responsivity, such as an infrared detector, from a slab of N-type, intrinsic bulk semiconductor material comprises shielding part of the detector active area between the positive and negative... | 02/14/1978 |
| 4056061 | Proximity fuse 1. An infrared proximity fuse comprising means to transduce infrared radiation intensity into the amplitude of an electrical signal, first circuit means including a low pass filter connected to filter substantially all frequencies except DC from said elec... | 11/01/1977 |
| 4049338 | Light polarizing material method and apparatus A method of making a light polarizing material having excellent polarization characteristics over wavelengths from the visible to the infrared (IR) region is disclosed. A smooth surface of an optical material, such as for example glass, plastic or IR tran... | 09/20/1977 |
| 4044567 | Modular, magnetically-coupled drive for a cryogenic refrigerator An improved Vuilleumier cycle refrigerator is disclosed. To reduce fluid contamination and inactive refrigerant volume, the hot and cold fluid displacers of the refrigerator are driven by a magnetic drive mechanism. The magnetic drive mechanism has a firs... | 08/30/1977 |
| 4041499 | Coaxial waveguide antenna Disclosed is a coaxial waveguide antenna. In a basic form the coaxial waveguide horn for the antenna comprises an inner section operating in a Σ (sum) mode only and an outer section operating in a Ɗ (difference) mode only. Where required for broadband (... | 08/09/1977 |
| 4028907 | Adjustable-Joule-Thomson cryogenic cooler with downstream thermal compensation An adjustable Joule-Thomson cryogenic cooler with a downstream thermal compensation mechanism is taught. The cryogenic cooler includes a cryogen source coupled to a manifold input port, the manifold input port connected to a heat exchanger, the heat excha... | 06/14/1977 |
| 4023176 | Beacon tracking display system A display system is disclosed for use in connection with a beacon tracking receiver. The display system provides both audible and visual displays for use in locating a source of radio transmission. The display includes an audible tone signal to indicate t... | 05/10/1977 |
| 4021807 | Beacon tracking system A radio frequency transmitter is hidden within a packet of currency which may be mingled with other currency packets in the cash drawer of a bank, convenience store or other such commercial institution. The transmitter is automatically activated by unauth... | 05/03/1977 |
| 4001828 | Beacon tracking receiver A radio frequency receiver is responsive to signals radiated by a remote transmitter. The receiver includes at least one pair of antennas separated by approximately one-half wavelength at the transmitter frequency. The phases of the signals detected by th... | 01/04/1977 |
| 4001835 | Scanning antenna with extended off broadside scanning capability An improved Lewis scanner comprising a focal lens having two best focus angles positioned with its axis at an angle other than perpendicular to the antenna aperture. The antenna aperture is maintained vertical with respect to the earth's surface to provid... | 01/04/1977 |
| 3999403 | Thermal interface for cryogen coolers An infrared receiver having a thermal conductive device for providing continuous thermal contact between a detector cooling means and an IR detector is disclosed. The thermal conductive device is bellows shaped and constructed from laminated layers of cop... | 12/28/1976 |
| 3998105 | Two axis rate sensor A rate sensor is disclosed comprising a motor driven elastic disk rotor, a light source for illuminating the surface of the disk rotor, a plurality of light detectors mounted on the x or y or both axes of the rate sensor, and a signal processor including ... | 12/21/1976 |
| 3980895 | Semiconductor magnetic modulator for use with a moving target indicator radar system The specification discloses a semiconductor magnetic modulator for use with a moving target indicator radar transmitter and which utilizes a plurality charging capacitors for receiving charging current from a direct current power source and discharging in... | 09/14/1976 |
| 3977793 | Radiation energy receiver An improved radiation energy detecting system is disclosed. The system comprises a rotating scanning mirror reflecting energy radiating from objects in the field of view through a novel image derotating prism, providing optimum transmission modulation tra... | 08/31/1976 |
